Former rivals Barack Obama and Hillary Clinton are planning their first joint election appearance on Friday.

The location, the town of Unity in New Hampshire, was announced today. It was chosen not only for the symbolism of its name, but because each candidate received exactly 107 votes there in the January primary that Mrs Clinton won.

New Hampshire is a critical battleground state in November.

The rally will be the morning after the two meet privately on Thursday at a Washington hotel with former Clinton donors.